Example usage for javax.script ScriptEngine getContext

Introduction

In this page you can find the example usage for javax.script ScriptEngine getContext.

Prototype

public ScriptContext getContext();

Source Link

Document

Returns the default ScriptContext of the ScriptEngine whose Bindings, Reader and Writers are used for script executions when no ScriptContext is specified.

Usage

From source file:Main.java

public static void main(String[] args) throws ScriptException {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");

    ScriptContext defaultCtx = engine.getContext();
    // Work with defaultCtx here

    // Create a new context
    ScriptContext ctx = new SimpleScriptContext();
    // Configure ctx here

    engine.setContext(ctx);/* w w  w . j  a  v a 2  s.  c  o m*/
}

From source file:Main.java

public static void main(String[] args) throws ScriptException {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");

    ScriptContext defaultCtx = engine.getContext();
    // Work with defaultCtx here

    // Create a new context
    ScriptContext ctx = new SimpleScriptContext();

    // Configure ctx here

    // Set ctx as the new default context for the engine
    engine.setContext(ctx);/* w ww. ja v  a2s .c  o  m*/

    ctx.setBindings(manager.getBindings(), ScriptContext.GLOBAL_SCOPE);

    engine.setContext(ctx);
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");
    engine.eval("var msg = 'Hello globals'");
    engine.eval("print(this.msg);");
    ScriptContext ctx = new SimpleScriptContext();
    ScriptContext defaultCtx = engine.getContext();
    Bindings engineBindings = defaultCtx.getBindings(ENGINE_SCOPE);
    ctx.setBindings(engineBindings, ENGINE_SCOPE);
    engine.eval("print(this.msg);", ctx);
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("JavaScript");

    File outputFile = new File("jsoutput.txt");
    System.out.println("Script output will be written to " + outputFile.getAbsolutePath());

    FileWriter writer = new FileWriter(outputFile);
    ScriptContext defaultCtx = engine.getContext();
    defaultCtx.setWriter(writer);//  w w w.  ja v a 2  s . c  o m
    String script = "print('Hello custom output writer')";
    engine.eval(script);
    writer.close();

}

From source file:org.siphon.common.js.JsEngineUtil.java

public static Object getGlobal(ScriptEngine engine) {
    ScriptContext context = engine.getContext();
    ScriptObjectMirror binding = (ScriptObjectMirror) context.getBindings(ScriptContext.ENGINE_SCOPE);
    Field globalField = null;/*from   www  .j  av  a2  s .co  m*/
    try {
        globalField = ScriptObjectMirror.class.getDeclaredField("global");
        globalField.setAccessible(true);
        Object global = globalField.get(binding);
        return global;
    } catch (NoSuchFieldException e) {
    } catch (SecurityException e) {
    } catch (IllegalArgumentException e) {
    } catch (IllegalAccessException e) {
    }
    return null;
}

From source file:org.netbeans.jcode.core.util.FileUtil.java

public static String expandTemplate(String template, Map<String, Object> values) {
    StringWriter writer = new StringWriter();
    ScriptEngine eng = getScriptEngine();
    Bindings bind = eng.getContext().getBindings(ScriptContext.ENGINE_SCOPE);
    if (values != null) {
        bind.putAll(values);/*from ww  w  .  ja  va2  s  .  c o  m*/
    }
    bind.put(ENCODING_PROPERTY_NAME, Charset.defaultCharset().name());
    eng.getContext().setWriter(writer);
    Reader is = new StringReader(template);
    try {
        eng.eval(is);
    } catch (ScriptException ex) {
        Exceptions.printStackTrace(ex);
    }

    return writer.toString();

}

From source file:org.netbeans.jcode.core.util.FileUtil.java

private static void expandTemplate(InputStream template, Map<String, Object> values, Charset targetEncoding,
        Writer w) throws IOException {
    //        Charset sourceEnc = FileEncodingQuery.getEncoding(template);
    ScriptEngine eng = getScriptEngine();
    Bindings bind = eng.getContext().getBindings(ScriptContext.ENGINE_SCOPE);
    bind.putAll(values);//from w w  w . ja va 2 s .c  om
    bind.put(ENCODING_PROPERTY_NAME, targetEncoding.name());

    Reader is = null;
    try {
        eng.getContext().setWriter(w);
        is = new InputStreamReader(template);
        eng.eval(is);
    } catch (ScriptException ex) {
        throw new IOException(ex);
    } finally {
        if (is != null) {
            is.close();
        }
    }
}

From source file:io.github.jeddict.jcode.util.FileUtil.java

public static void expandTemplate(Reader reader, Writer writer, Map<String, Object> values,
        Charset targetEncoding) throws IOException {
    ScriptEngine eng = getScriptEngine();
    Bindings bind = eng.getContext().getBindings(ScriptContext.ENGINE_SCOPE);
    bind.putAll(values);//from w  w  w  .  j a v  a  2s  . com
    bind.put(ENCODING_PROPERTY_NAME, targetEncoding.name());

    try {
        eng.getContext().setWriter(writer);
        eng.eval(reader);
    } catch (ScriptException ex) {
        throw new IOException(ex);
    } finally {
        if (reader != null) {
            reader.close();
        }
    }
}

From source file:io.github.jeddict.jcode.util.FileUtil.java

public static String expandTemplate(String inputTemplatePath, Map<String, Object> values) {
    InputStream contentStream = loadResource(inputTemplatePath);
    StringWriter writer = new StringWriter();
    ScriptEngine eng = getScriptEngine();
    Bindings bind = eng.getContext().getBindings(ScriptContext.ENGINE_SCOPE);
    if (values != null) {
        bind.putAll(values);//from  ww  w  . j a  v  a2  s  . c  om
    }
    bind.put(ENCODING_PROPERTY_NAME, Charset.defaultCharset().name());
    eng.getContext().setWriter(writer);
    Reader is = new InputStreamReader(contentStream);
    try {
        eng.eval(is);
    } catch (ScriptException ex) {
        Exceptions.printStackTrace(ex);
    }

    return writer.toString();
}

From source file:io.github.jeddict.jcode.util.FileUtil.java

/**
 * In-memory template api/*from  w  ww  .j  av  a  2s .  c  om*/
 *
 * @param templateContent
 * @param values
 * @return
 */
public static String expandTemplateContent(String templateContent, Map<String, Object> values) {
    StringWriter writer = new StringWriter();
    ScriptEngine eng = getScriptEngine();
    Bindings bind = eng.getContext().getBindings(ScriptContext.ENGINE_SCOPE);
    if (values != null) {
        bind.putAll(values);
    }
    bind.put(ENCODING_PROPERTY_NAME, Charset.defaultCharset().name());
    eng.getContext().setWriter(writer);
    Reader is = new StringReader(templateContent);
    try {
        eng.eval(is);
    } catch (ScriptException ex) {
        Exceptions.printStackTrace(ex);
    }

    return writer.toString();
}